Two stations along the 1 line will be closed until the weekend as crews work to repair a partial subway ceiling collapse.

The 181 St. station will be outfitted with a platform so that contractors can inspect and remove any loose bricks that still might be on the arched ceiling. The 191 St. station has also been closed.

“This work will take days to complete, and we do not anticipate resuming 1 service until this weekend,” NYCT said. The agency also said they knew about the weak bricks of the historically-designated 181 St. station.

Officials said they were “keenly aware that the ceiling was in need of repair and restoration” and that money was provided for the work.

Uptown 1 trains will stop running at 168th Street, where straphangers can board a free bus to Dyckman Street.

Downtown trains leaving from 242nd St. will stop running at Dyckman, and a free shuttle will be provided to 168th Street.

Also, sections of the M3 bus route along St. Nicholas Avenue northbound to 168th Street; in both directions at 181st Street, and southbound at 191st Street will be free while the stations are shut down.

The bricks fell from a 35-foot high ceiling at 181 St. on Monday morning and covered about 35 feet of track, officials said.